CVE-2026-98137 ntfs: treat any nonzero dio zero-range return as an error

Medium 5.5 Published Updated

A flaw in the Linux kernel NTFS driver allows attackers to read stale on-disk data due to ignored zeroing errors during file allocation.

Exploited in the wild
Not known
Login needed
Any signed-in user
Attackable
Local or same network only
Victim action needed
Not needed
Fix
Available

What is CVE-2026-98137?

CVE-2026-98137 is a medium-severity vulnerability in Linux kernel, published on 25 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ntfs: treat any nonzero dio zero-range return as an error

ntfs_dio_zero_range() returns either 0 or a negative errno from blkdev_issue_zeroout(); it never returns a positive value. The zeroing failure check in ntfs_attr_fallocate() therefore never fired, so a failed zeroing operation was silently ignored: the loop kept going, the newly allocated clusters were folded into initialized_size and the write could succeed leaving stale on-disk data.

Treat any nonzero return as an error and abort the allocation.

Which versions are affected by CVE-2026-98137?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-98137?

Apply the vendor's patch.

Is CVE-2026-98137 being exploited?

There is no known exploitation of CVE-2026-98137 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2026-98137, GHSA-pm9x-9ffx-jrqj, UBUNTU-CVE-2026-98137.

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